Magnetization Process of Atacamite: A Case of Weakly Coupled S=1/2 Sawtooth Chains.

Autor: Heinze L; Institut für Physik der Kondensierten Materie, Technische Universität Braunschweig, D-38106 Braunschweig, Germany., Jeschke HO; Research Institute for Interdisciplinary Science, Okayama University, Okayama 700-8530, Japan., Mazin II; Department of Physics and Astronomy, George Mason University, Fairfax, Virginia 22030, USA.; Quantum Science and Engineering Center, George Mason University, Fairfax, Virginia 22030, USA., Metavitsiadis A; Institut für Theoretische Physik, Technische Universität Braunschweig, D-38106 Braunschweig, Germany., Reehuis M; Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, D-14109 Berlin, Germany., Feyerherm R; Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, D-14109 Berlin, Germany., Hoffmann JU; Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, D-14109 Berlin, Germany., Bartkowiak M; Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, D-14109 Berlin, Germany., Prokhnenko O; Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, D-14109 Berlin, Germany., Wolter AUB; Institute for Solid State and Materials Research, Leibniz IFW Dresden, D-01069 Dresden, Germany., Ding X; National High Magnetic Field Laboratory, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA., Zapf VS; National High Magnetic Field Laboratory, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA., Corvalán Moya C; National High Magnetic Field Laboratory, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.; National Atomic Energy Commission (CNEA), Tres de Febrero University (UNTREF), National Scientific and Technical Research Council (CONICET), Argentina., Weickert F; National High Magnetic Field Laboratory, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA., Jaime M; National High Magnetic Field Laboratory, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA., Rule KC; Australian Nuclear Science and Technology Organisation, Lucas Heights, New South Wales 2234, Australia., Menzel D; Institut für Physik der Kondensierten Materie, Technische Universität Braunschweig, D-38106 Braunschweig, Germany., Valentí R; Institut für Theoretische Physik, Goethe-Universität Frankfurt, D-60438 Frankfurt am Main, Germany., Brenig W; Institut für Theoretische Physik, Technische Universität Braunschweig, D-38106 Braunschweig, Germany., Süllow S; Institut für Physik der Kondensierten Materie, Technische Universität Braunschweig, D-38106 Braunschweig, Germany.
Jazyk: angličtina
Zdroj: Physical review letters [Phys Rev Lett] 2021 May 21; Vol. 126 (20), pp. 207201.
DOI: 10.1103/PhysRevLett.126.207201
Abstrakt: We present a combined experimental and theoretical study of the mineral atacamite Cu_{2}Cl(OH)_{3}. Density-functional theory yields a Hamiltonian describing anisotropic sawtooth chains with weak 3D connections. Experimentally, we fully characterize the antiferromagnetically ordered state. Magnetic order shows a complex evolution with the magnetic field, while, starting at 31.5 T, we observe a plateaulike magnetization at about M_{sat}/2. Based on complementary theoretical approaches, we show that the latter is unrelated to the known magnetization plateau of a sawtooth chain. Instead, we provide evidence that the magnetization process in atacamite is a field-driven canting of a 3D network of weakly coupled sawtooth chains that form giant moments.
Databáze: MEDLINE